IE_EMPTYUNDOBUFFER
Empties the
undo buffer.
Parameters
wParam
Not used;
must be 0.
lParam
Not used;
must be 0.
Return Value
Returns one
of the following:
|
Constant |
Description |
|
IER_OK |
Success. |
|
IER_PARAMERR |
wParam or lParam is invalid. |
|
IER_SECURITY |
The control
has security protection disallowing the operation. |
Comments
If there is
nothing in the undo buffer, this message returns IER_OK but does nothing else.
As long as the buffer remains empty after sending IE_EMPTYUNDOBUFFER, the
messages IE_CANUNDO and WM_UNDO return FALSE.
See Also